Section 30:8 - Subpoenas, and production of records; service; excuses for disobedience; enforcement of subpoenasA. The commissioner may subpoena witnesses and require their attendance and the giving of testimony before him. He may require the production of any books, papers, or records material to the questions lawfully before him. (1) Subpoenas shall be served by any agent of the department of conservation, by the sheriff, or by any other officer authorized by law to serve process in this state.(2) No person shall be excused from attending and testifying or producing books, papers, or records, or from obeying the subpoena of the commissioner or of a court of record on the ground that the testimony or evidence required of him may tend to incriminate him or subject him to penalty or forfeiture.(3) Nothing contained in this Subsection shall be construed as requiring any person to produce books, papers, or records, or to testify in response to any inquiry not pertinent to some question lawfully before the commissioner or court for determination.(4) No natural person shall be subjected to criminal prosecution or to any penalty or forfeiture on account of anything concerning which he may be required to testify or produce evidence before the commissioner or a court.(5) No person testifying shall be exempt from prosecution and punishment for perjury.B. In the case of failure or refusal of a person to comply with a subpoena issued by the commissioner, or in the case of the refusal of a witness to testify or answer as to a matter regarding which he may be lawfully interrogated, any district court on the application of the commissioner may, in term time or in vacation, issue an attachment for the person to compel him to comply with the subpoena and to attend before the commissioner with the desired documents and to give his testimony upon whatever matters are lawfully required. The court may punish for contempt those disobeying its orders as in the case of disobedience of a subpoena issued by the court or refusal to testify therein.